JPS59211929A - Polarized solenoid relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic relay in which a contact member is enclosed in a container, and particularly to a polarized electromagnetic relay using a permanent magnet.

The structure of a conventional electromagnetic relay of this kind will be explained with reference to FIG. 1. It has a neutral terminal 101 made of a conductor, and first and second terminals made of a soft magnetic conductor and fixed contacts 102 and 103, respectively. The fixed contact terminals 104 and 105 are arranged such that their respective drawer portions protrude outside the insulating casing 106 made of synthetic resin, and the two fixed contact terminals 104
．． 105 are fixed to an insulating casing 106 so as to be placed on both sides of the neutral terminal 101. Refreshingly, the armature 107 is made of a soft magnetic material and has an optional protrusion at the lower center that contributes to setting the fulcrum of the tilting motion and the contact gap, and the movable contact 108 is made of a thin plate-like movable material made of a non-magnetic conductive material. A movable contact assembly is formed by fixing a contact spring 109 to a fixed contact terminal 104 by welding or the like.
The movable contact spring 109 is fixed to the neutral terminal 101 by welding or the like so that it faces the end of the armature 105 and the protrusion of the armature 107 comes into contact with the central flat part of the neutral terminal 101. .

In addition, permanent magnets 110a and 110b are placed near the tops of the fixed contact terminals 104 and 105 so that both of them are magnetized to the same polarity. [! By fixing an upper housing (lid) 111 made of synthetic resin onto the open peripheral edge of the insulating housing 106, the above-mentioned contact components are airtightly housed and a winding frame is formed. An excitation winding 112 is wound around this and connected to a coil terminal 113. The yoke 114 is fixed to the lower part of the insulating casing 106 and forms a magnetic flux path. Also, the housings 106 and 111
A wire protection cover 115 is attached to the outer periphery of the wire.

In the transfer type electromagnetic relay configured as described above, the permanent magnets 110a and 110b are fixed contact terminals 104.
105, the magnetic gap between the fixed contact terminal and the armature and the distance between the permanent magnets become longer, generating leakage magnetic flux and reducing magnetic efficiency. cannot be avoided.

Furthermore, in order to compensate for the decrease in magnetic efficiency, it is necessary to increase the size of the magnet, which inevitably results in an increase in the size of the relay.

Furthermore, problems such as the fact that the impressed voltage value tends to vary due to variations in the magnetic flux density of the two permanent magnets have occurred.

The present invention has been made in order to eliminate the above-mentioned disadvantages inherent in the conventional technology.9 Therefore, an object of the present invention is to place one permanent magnet directly under a neutral terminal made of a soft magnetic material. Therefore, it is an object of the present invention to provide a novel polarized electromagnetic relay which is small in size, has excellent magnetic efficiency, and has little variation in emotional value.

In order to achieve the above object, the polarized electromagnetic relay according to the present invention has a lead-out portion penetrating an insulating casing. contacting the top surface of the first terminal, and using the contact point as a fulcrum.
an armature made of a soft magnetic material that selectively makes tilting contact with the second and third terminals made of a soft magnetic material respectively arranged on both sides of the terminal; a movable contact spring portion having a movable contact member that switches and contacts fixed contact members provided at the second and third terminals in accordance with the tilting of the pole; and the movable contact spring portion is electrically connected to the first terminal. a conductive thin plate movable spring having a movable arm portion thereon that supports the tilting movement of the armature; a permanent magnet disposed near the terminal of the M1 and on the opposite side of the surface that contacts the fulcrum of the armature; a yoke disposed on the other end side of the permanent magnet and forming a magnetic flux path between the second and third terminals and the permanent magnet; and a yoke coupled on the insulating casing to connect each member. The insulating bell body constituting the housing container, the housing and the lid are wound together as a winding frame, and the armature is tilted to connect the movable contact member and the fixed contacts of the tJ2 and third terminals. and an excitation=4- winding for making selective contact with the member.

Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 2 is a partially cutaway perspective view showing an embodiment of the polarized VL magnetic vertical relay according to the present invention. In FIG. 2, there is a substantially H-shaped neutral terminal 201 made of a soft magnetic and conductive material, and first and second fixed contact terminals 202 made of a soft magnetic and conductive material to which fixed contacts 204 and 205 are fixed. .201 and each drawer part are made of an insulating casing 2 made of synthetic resin or the like.
06 and the two fixed contact terminals 202 and 203 are connected to both 1ll of the neutral terminal 201.
It is fixed to the insulating casing 206 so as to be located at 1. Furthermore, the armature 20 is made of a soft magnetic material and has a protrusion in the center that contributes to setting the fulcrum of the tilting motion and the contact spacing.
7 and a thin plate-shaped movable spring 208 made of a non-magnetic conductor having movable contacts 269 and 210 are fixed by welding or the like. The movable spring 208 is connected to the neutral terminal 2 so that the movable spring 208 faces the ends of the neutral terminals 202 and 203 and the protrusion of the armature 207 contacts the central flat part of the neutral terminal 201.
It is fixed to 01 by explosion welding or the like. The configuration up to this point is the same as the conventional configuration example shown in FIG.

The permanent magnet 211 is placed near the neutral terminal 201, that is, on the opposite side of the surface that contacts the armature 207. With this arrangement, conventional fixed contact terminals 202, 203
Since the permanent magnet part that was placed on the outside can be omitted,
Since the entire relay is downsized and the fixed contact terminals are also shortened, the resistance between the terminals is also reduced.

In addition, since there is only one magnet, variations in the impression value due to variations in the magnetic flux of conventional 21rlA permanent magnets do not occur.An insulating upper casing 212 made of synthetic resin is placed on the opening periphery of the insulating casing 206. By fixing (one body),
The contact member as described above is hermetically housed, and a winding frame is formed. An excitation winding 213 is wound around this. At the bottom of the insulating casing 206, a substantially U-shaped yoke 214 connects the permanent magnet 211 and the fixed contact terminal 202.
203, respectively, to form a magnetic flux path.

In this embodiment, the permanent magnet 211 is magnetized, for example, in the upper and lower blade direction, and the magnetic flux path is as follows: permanent magnet 211 → neutral terminal 201 → armature 207 → fixed contact terminal 202.20
Either one of 3 (due to the tilting movement of the armature 207) →
The yoke 214 becomes the permanent magnet 211, creating a closed circuit of magnetic flux lines, which improves magnetic efficiency and allows the permanent magnet to be made smaller. Note that the fixed contact terminal 202. which the yoke 214 comes into contact with.
Since 203 is a signal line for switching, it cannot be electrically short-circuited.For this reason, if the yoke 214 is a conductor, C is a VL or resin wire with a thin resin sandwiched between both ends that contact the fixed contact terminal. Ensure insulation through coating, etc.

Finally, a protective cover 215 is attached to the relay body.

Next, the principle of operation of the present invention will be explained using FIG. 3(a), Φ). In FIG. 3G, the permanent magnet 211 causes the armature 207 to be magnetized uniformly and with the same polarity at both ends thereof, making it bistable with respect to tilting. Therefore,
The armature 207 is in either state of (a) or Φ in FIG. 3. In the figure, 9IN is the magnetic flux from the permanent magnet 2117-. Next, the permanent magnet 2 is attached to the excitation winding 213.
When current is applied in a direction that cancels the magnetic flux g5M due to 11, an attractive force acts on both ends of the armature 207 in the opposite direction, causing tilting and switching operation. Operates as a holding type electromagnetic relay.

In addition, as shown in FIG. 4(a), if the one-force end of the U-shaped yoke 214 is removed and the gap between the negative force and the fixed contact terminal 203 is increased, the suction force will be unbalanced and shifted. Monostable operation, current holding type can be easily realized.Also,
Fig. 4 Φ) shows the 21st embodiment of monostable operation. □The advantage is that the attractive force increases and the contact pressure can be increased.

As explained above, the present invention has a structure in which a permanent magnet is placed directly under the neutral terminal, which makes it possible to achieve a smaller size, better magnetic efficiency, and higher density mounting than the conventional structure shown in FIG. Electromagnetic appliances are obtained.

[Brief explanation of the drawing]

8- FIG. 1 is a partially cutaway perspective view showing an example of a conventional polarized electromagnetic relay, FIG. 2 is a partially cutaway perspective view showing an example of a polarized electromagnetic relay according to the present invention, and FIG. ), Φ) are schematic diagrams of magnetic circuits in the case of self-holding type in the electromagnetic relay according to the present invention, and Figures 4(a) and (b) are schematic diagrams of magnetic circuits in the case of self-holding type in the electromagnetic relay according to the present invention. , is a schematic diagram of an air circuit. 201...□ Neutral-child, 202.203... Fixed contact terminal, 204.205.0. Fixed contact, 206- @
- Insulating casing, 207... Armature, 208・φ・Movable spring, 20G, 210... Movable contact □ point, 211...
-Permanent magnet, 2]22...Upper housing, 213-...Excitation winding, 214416.417/1 joint, 2151.Protective cover, 216...Spring mount special punch applicant NEC Corporation representative Patent Attorney Yutabe Kumagai

Claims (1)

[Claims] First, second and third terminals made of a conductive soft magnetic material each having a lead-out portion penetrating the insulating casing; an armature made of a soft magnetic material that selectively tilts into contact with the second and third terminals respectively arranged on both sides of the first terminal with the contact point as a fulcrum, and arranged on the armature; A movable contact spring portion having a movable contact member that switches and contacts fixed contact members provided at the second and third terminals in response to the tilting of the armature, and is electrically connected to the first terminal. a conductive thin plate movable spring having a movable arm for supporting the tilting movement of the armature; and a permanent conductive thin plate movable spring disposed near the first terminal and on the opposite side of the surface contacting the armature. a magnet, a substantially U-shaped yoke disposed on the other end side of the permanent magnet and forming a magnetic flux path between the second and third terminals and the permanent magnet, and the insulating casing. An insulating fish body that is combined on the body to constitute a container for accommodating each member, and the insulating casing and lid are wound as a winding frame, and by tilting the armature, the movable contact member A polarized electromagnetic relay comprising: an excitation winding that makes selective contact with each of the fixed contact members of the second and third terminals.